void change_ptr(int& a){
	a = 43;
}
void change_ref(int& a) {
	a = 7;
}
void doNothong(int a) {
	a = 100;
}

int mainFunc(int arg1, int arg2, int arg3)
{
	change_ptr(arg1);
	change_ref(arg2);
	doNothong(arg3);
	return arg1 + arg2 + arg3;
}

//[(1,2,3),53]
//[(-1,-2,-1),49]
//[(0,0,0),50]
//[(100,100,100),150]